Пошаговое объяснение:
№1
3/7 = (3*2)/(7*2) = 6/14
3/7 = (3*3)/(7*3) = 9/21
3/7 = (3*13)/(7*13) = 39/91
№2
11/121 = (11:11)/(121:11) = 1/11
7/77 = (7:7)/(77:7) = 1/11
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Пошаговое объяснение:
№1
3/7 = (3*2)/(7*2) = 6/14
3/7 = (3*3)/(7*3) = 9/21
3/7 = (3*13)/(7*13) = 39/91
№2
11/121 = (11:11)/(121:11) = 1/11
7/77 = (7:7)/(77:7) = 1/11